Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2526
CALL
Canadian Pacific Kansas City
CP
$82B
| $1.65M | ﹤0.01% |
20,900
-25,900
| -55% | -$1.9M |
|
2527
CALL
Wendy's
WEN
$1.33B
| $1.65M | ﹤0.01% |
84,700
+51,800
| +157% | +$997K |
|
2528
PUT
Lumen
LUMN
$6.53B
| $1.65M | ﹤0.01% |
900,800
-732,800
| -45% | -$1.04M |
|
2529
PUT
Labcorp
LH
$24.3B
| $1.65M | ﹤0.01% |
62,700
-40,600
| -39% | -$8.53M |
|
2530
PUT
Payoneer
PAYO
$2.41B
| $1.65M | ﹤0.01% |
316,000
-141,800
| -31% | -$781K |
|
|
MRNS
2531
CALL
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $1.65M | ﹤0.01% |
151,500
-133,600
| -47% | -$1M |
|
2532
PUT
Owens Corning
OC
$11.5B
| $1.65M | ﹤0.01% |
11,100
+8,300
| +296% | +$1.1M |
|
2533
PUT
Rithm Capital
RITM
$5.09B
| $1.65M | ﹤0.01% |
173,600
+78,700
| +83% | +$783K |
|
2534
PUT
Virgin Galactic
SPCE
$320M
| $1.64M | ﹤0.01% |
33,545
+15,370
| +85% | +$607K |
|
|
QLTB
2535
CALL
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $1.64M | ﹤0.01% |
21,800
+7,200
| +49% | +$541K |
|
2536
CALL
Kosmos Energy
KOS
$1.56B
| $1.64M | ﹤0.01% |
243,700
+74,000
| +44% | +$518K |
|
2537
CALL
UGI
UGI
$8B
| $1.63M | ﹤0.01% |
66,400
+24,700
| +59% | +$545K |
|
2538
e.l.f. Beauty
ELF
$4.56B
| $1.63M | ﹤0.01% |
+11,288
| New | +$1.3M |
|
|
VSXY
2539
PUT
Victoria's Secret
VSXY
$6.64B
| $1.63M | ﹤0.01% |
61,300
+40,100
| +189% | +$851K |
|
2540
PUT
Parsons
PSN
$6.28B
| $1.62M | ﹤0.01% |
25,900
+25,400
| +5,080% | +$1.54M |
|
2541
CALL
Banco Bradesco
BBD
$38.1B
| $1.62M | ﹤0.01% |
464,360
-16,200
| -3% | -$50.8K |
|
2542
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$263M
| $1.62M | ﹤0.01% |
28,200
+13,300
| +89% | +$698K |
|
2543
PUT
Avery Dennison
AVY
$12.3B
| $1.62M | ﹤0.01% |
8,000
+7,500
| +1,500% | +$1.4M |
|
|
CERE
2544
CALL
DELISTED
Cerevel Therapeutics Holdings, Inc. Common Stock
CERE
| $1.61M | ﹤0.01% |
38,100
-45,700
| -55% | -$1.31M |
|
2545
PUT
Sprott Junior Uranium Miners ETF
URNJ
$306M
| $1.61M | ﹤0.01% |
39,900
-98,000
| -71% | -$2.29M |
|
|
ITCI
2546
PUT
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $1.61M | ﹤0.01% |
22,500
+14,200
| +171% | +$817K |
|
2547
BellRing Brands
BRBR
$1.51B
| $1.61M | ﹤0.01% |
+29,027
| New | +$1.4M |
|
2548
PUT
Navios Maritime Partners
NMM
$2.25B
| $1.61M | ﹤0.01% |
57,500
+6,600
| +13% | +$159K |
|
2549
PUT
Rollins
ROL
$18.6B
| $1.61M | ﹤0.01% |
36,800
+26,400
| +254% | +$1.03M |
|
2550
PUT
Cheesecake Factory
CAKE
$4.21B
| $1.61M | ﹤0.01% |
45,900
-19,400
| -30% | -$619K |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.